Physics

A copper wire that has been heated to 520 degrees Celsius for pliability is plunged into 350 mL of water at 18 degrees Celsius. The final temperature of the copper and water bath is 31 degrees Celsius. Find the mass of the copper wire

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  1. heat added to copper+heat added to water=0

    m*Ccu(31)+350*Cwater*(31-18)=0
    look up the specific heat of water, and copper, and solve for mass m.

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    bobpursley
  2. I get 50050, which is wrong...

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  3. Obviously wrong. you specific heats should be in J/g

    Oops..I eerred. should be...
    m*Ccu(31-520)+350*Cwater*(31-18)=0
    look up the specific heat of water, and copper, and solve for mass m.

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    bobpursley
  4. I get -102.4 which is still the wrong answer..... my textbook says the answer is 0.10 kg

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  5. You cannot get a negative number from the above.

    m=(-350*4.18)/(.386*(-489))

    I get almost 8 grams. Work it out.

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    bobpursley

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